Question

In a class of 30 students , the number of boys is twice the number of girls,then what is the number of girls?

Answer 1

Answer:

Given -

• Total = 30 students
• the number of boys is twice the number of girls

We need to find -

• total number of girls

Solution -

Let the number of girls be z.

So, the number of boys = 2z.

According to the Question,

z + 2z = 30

→ 3z = 30

→ z = 30/3

→ z = 10

• So, the number of girls is 10.
• Number of boys = 2z = 2×10 = 20.

Answer 2

☣️$\rm\blue{GIVEN}$

• Number of Student = 30

• The Number of boys is twice the number of girls.

☣️$\rm\blue{To\:Find}$

• The Number of girls.

Now,

Let the Number of Girls be "x"

Number of Boys= 2x

$\implies\rm\red{2x+x=30}$

$\implies\rm\red{3x=30}$

$\implies\rm\red{x=\dfrac{30}{3}}$

$\implies\rm\red{x=10}$

Hence, The Number of girls is 10

Number of Boys= 2x= 2×10= 20boys.

$\tt\blue{Verification}$

Number of boys+ Number of Girls= Total Number of Student.

20+10=30

Hence, Verified✔️